Copper-silicon-aluminum alloy



Patented Mar. 23, 1937 UNITED STATES PATENT OFFICE 2 Claims. (01. 'zrs-lco) This invention relates to a copper base alloy and more particularly to an alloy of copper, silicon and aluminum.

This application is a continuation in part of 5 my prior application Serial Number 683,480, filed 0 workability of the alloy, and especially hot rolling and extruding, and it can also be cold rolled. The aluminum also further increases the strength and hardness.

The relative proportions of the elements may 25 vary depending on the use towhich the alloy is to be put, the silicon content varying from about 0.1% to about 0.75%, the aluminum from about 1% to about and the balance copper. A specific alloy which has been found very useful and to have desirable characteristics is composed of approximately 96.65% copper, 2.75% aluminum, and 0.6% silicon.

These alloys are adapted for various uses. They may be hot rolled, extruded, and cold rolled. They may be made into wire, rods, tubes, sheets and various shapes. They may alsobe drawn, stamped, formed or spun into cups and other forms of drawn metal articles. In short they may be made into various articles by rot rolling, cold rolling, extruding, drawing, or spinning, or any combination of these various operations.

Having thus set forth the nature of my invention, what I claim is:

1. A copper base alloy composed of from 0.1% to 0.75% silicon, from 1% to 10% aluminum, and balance copper.

2. An alloy containing substantially 96.65% copper, 2.75% aluminum, and .6% silicon.

DANIEL R. HULL. 

